public class Example2_2{
    public static void main(String args[]){
    byte b=22;
    int n=129;
    float f=123456.6789f;
    double d=123456789.123456789;
    System.out.println("b= "+b);
    System.out.println("n= "+n);
    System.out.println("f= "+f);
    System.out.println("d= "+d);
    b=(byte)n;//导致精度的损失
    f=(float)d;//导致精度的损失
    System.out.println("b= "+b);
    System.out.println("f= "+f);
    }
}

